Accelerator for dry-pipe-sprinkler systems



Nov. 23 1926.

1,608,074 E. TYDEN ACCELERATOR FOR DRY PIPE SPRINKLER SYSTEMS Filed August 23, 1924 Q1/1111. uy/I/ A Fin Patented Nov. 23, 1926.

EMIL :TYDE'N, .OF EVANSTON, ILLINOIS.

ACCELERATOR FOR DRY-PIPE-SPRINKLER SYSTEMS.

Application filed August 23, 1924. Serial No. 733,668.

The purpose of this invention is to provide an improved construction and connection' of an accelerating device fora dry pipe sprinkler system, particularly for the purpose of preventing the access of waterfrom the system to the accelerating device. It consists inthe elements and features ofconstruction shown and described as indicated in the claims.

In the drawings:

Figure 1 is a partly sectional side elevation of a dry pipe valve ofa sprinkler sys-' tem andthe initial portion of th'e'discharge pipe thereof and an accelerating device thereon connected in accordance with this invention. I

Figure 2 is a section at the line, 2"2, on Figure 1.

In'the structure shown in the drawings, the main valve of a dry pipe sprinkler system is indicated as to its entirety, andparticularly as to its casing, by the reference letter A; the accelerating device is indicated as to its entirety and particularly as to its casingby the reference letter I). The main valve casing and inain valve therein' and its operating parts and connections are in general of familiar construction, the qmain valve member, 10,-being constructed forseating at two concentric seats, '11 and 12, between which at the entering side there exists an interseat chamber, 13, which is normally under'atmospheric pressure, the two seats defining dit ierentiel pressure areas ofthe' main valve for the well understood purpose of adapting the valve to be held seated by the air pres sure in the air pressure region ofthe system operating over the larger area, as'against the water pressure operating at the opposite side of the valve over the lesser area and the interseatchamber normally atatmospheric system to equal ze the air pressure at opposite sides of the valve over the interseat area so that the valve will be opened by the excess of the water pressure over the air pressure at the lesser of the two differential areas. The accelerating device it will be understood is designed to control the admission of the pressure from the air pressure region to the interseat chamber, 13, for equalizing the pressure at the two sides of the valve over this interseat area when pressure in said air pressure region is reduced to the extent which may be caused by the opening oressure being arranged 'for admisison of pressure from the air pressure region ot the of a single sprinkler head due to tire, and calling for the opening of the main valve to flood the system'with water. The construction of the accelerating device for this purpose does notconstitute in itself a part of the {resent invention, but may be understood from the drawings as characterized by the provision of two chambers, 20 and 21 be tween which thereis interposed a diaphragm or equivalent moving wall, 22, exposed on its opposite sides to the pressures which may be operative in the two chambers respectively, these pressures being derived from the air pressure region of the system through passages afi ording unequal access of said pressure to the chambers respectively, and thereby to the opposite sides of the diaphgram,

said passages being indicated at23 and 24,

respectively, the passage, 23, leading to the chamber, 20, having a restriction shown at 25 while the passage, 24, admits the air pressure freely to the chamber, 21, with the 'resuit that upon reduction or" pressure in the air pressure region, this reduction is expe'- rienced promptly in the chamber, 21, and at the side of the diaphragm with which said chamber communicates, through ports, 28, in the diaphragm chamber wall, 29, while it'is communicated,slowly to the opposite side of the diaphragm through the ports, 27, in the diaphragm chamber wall, 26; so that upon such' reduction of pressure the diaphragm is moved by the retained and only slightly diminished pressure in" the chamber, 20,- againf-t the substantially diminished pres sure in the chamber, 21, and through the mechanical connections shown and which need not be further described, opens the valve, 30, which controls the access of the air pressure from the system to the interseat' atmospheric pressure chamber, 13, of the mainvalve. The'air connection from the air-pressure region in which connection'said valve, 30, is located, leads from the main valvechamber at a point therein above the overflow or valve-sealing level thereof, provision for connection with said chamber at this point being made by an extension, 40, of the main valve easing into which the pipe, 41, protrudes downwardly and from which said pipe leads upwardly for connection with the accelerating device which is made at 42, in a valve chamber, 43, in which is the valve seat, 44, at which is seated the valve, 30, which is operated as above described by the movement of the diaphragm, 22, resultiii) Fit

i A i A device adapted to be used for removing a Wheel from an axle upon Which it is keyed comprising a body provided at its opposite ends With alined sockets of different sizes, and anvil plugs fitting in the sockets.

In testimony whereof I affix my signature.

CASH A. CLEMONS. 

